Canon
RF 24-70mm F2.8L IS USM
Canon RF Mount
The cornerstone zoom for Canon mirrorless, featuring 5 stops of optical image stabilization.
$2,399
Launch priceReleased Aug 2019
OM System
M.Zuiko Digital ED 300mm F4 IS PRO
Micro Four Thirds Mount
600mm-equiv. F4 super-telephoto with Sync IS (6 stops), 1475g weight, removable rotating tripod collar, and PRO weather sealing.
$3,499
Launch priceReleased Feb 2016
RF 24-70mm F2.8L IS USM is 3.6 years newer.
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Wins
RF 24-70mm F2.8L IS USM
Wins
M.Zuiko Digital ED 300mm F4 IS PRO
Which would you choose?
TL;DR — Key differences
- ARF 24-70mm F2.8L IS USM has lower Min focus distance (21 cm vs 140 cm)
- ARF 24-70mm F2.8L IS USM has lower Length (125 mm vs 227 mm)
- ARF 24-70mm F2.8L IS USM has lower Weight (900 g vs 1475 g)
- ARF 24-70mm F2.8L IS USM has lower Max aperture (Wide) (f/2.8 vs f/4)
- ARF 24-70mm F2.8L IS USM has lower Max aperture (Tele) (f/2.8 vs f/4)
Key specs at a glance
Size and weight, to scale
📸 Snap this lens size diff to share
RF 24-70mm F2.8L IS USM
⌀88 × 125 mm
900 g (1.98 lb / 31.75 oz)
Credit card
85.6 × 54 mm
for scale
M.Zuiko Digital ED 300mm F4 IS PRO
⌀93 × 227 mm
1475 g (3.25 lb / 52.03 oz)
RF 24-70mm F2.8L IS USM is 102mm shorter and 5mm narrower than M.Zuiko Digital ED 300mm F4 IS PRO.
RF 24-70mm F2.8L IS USM is 575 g lighter than M.Zuiko Digital ED 300mm F4 IS PRO.
Diameter (⌀) is the maximum barrel width; length is measured from the mount to the front of the lens.
Use-case scoring
Which one for what?
Algorithmic scores from verified specs · 10 = best in class
Why pick one over the other
Reasons to choose the RF 24-70mm F2.8L IS USM
- ✓
Special elements
Adds 3 Aspherical, 3 UD
- ✓
Min focus distance
21 cm vs 140 cm — lower is better
- ✓
Length
125 mm vs 227 mm — lower is better
- ✓
Weight
900 g vs 1475 g — lower is better
- ✓
Max aperture (Wide)
f/2.8 vs f/4 — lower is better
- ✓
Max aperture (Tele)
f/2.8 vs f/4 — lower is better
- ✓
OIS effectiveness
5 stops vs 4 stops — higher is better
- ✓
Max magnification
0.3 × vs 0.24 × — higher is better
Reasons to choose the M.Zuiko Digital ED 300mm F4 IS PRO
- ✓
Special elements
Adds 3 Super ED, 3 HR, 1 E-HR
- ✓
Custom function button
Only M.Zuiko Digital ED 300mm F4 IS PRO supports it
Shared specifications
Internal focus
Both support internal focus
Optical stabilization
Both support optical stabilization
Weather sealing
Both support weather sealing
Control ring
Both support control ring
Pros & cons at a glance
Editorially curated highlights and trade-offs.
RF 24-70mm F2.8L IS USM
Pros
- ✓Built-in optical image stabilization (up to 5 stops)
- ✓Excellent L-series sharpness and build quality
- ✓Fast and silent Nano USM focus motor
- ✓Very low chromatic aberration
Cons
- –Heavier than competitive options (900g)
- –Pricey entry threshold
- –Minor barrel distortion at 24mm
M.Zuiko Digital ED 300mm F4 IS PRO
Pros
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Built-in optical image stabilization
- ✓Weather-sealed construction for outdoor shooting
Cons
- –Premium price point
- –Relatively heavy for extended handheld use
- –Slower maximum aperture limits low-light performance
Decided which one is right for you?
Compare live prices for the RF 24-70mm F2.8L IS USM and M.Zuiko Digital ED 300mm F4 IS PRO at major authorized retailers.
Canon RF 24-70mm F2.8L IS USM
OM System M.Zuiko Digital ED 300mm F4 IS PRO
Affiliate disclosure: As an Amazon Associate, Cameraegg earns from qualifying purchases. Cameraegg may also earn commission from B&H links, at no extra cost to you.
Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.